Anomalous impurity effect on magnetization in frustrated one-dimensional ferro- and ferrimagnets
Strongly Correlated Electrons
2009-03-23 v1 Disordered Systems and Neural Networks
Abstract
Significant decrease of spontaneous magnetization in frustrated one-dimensional ferro- and ferrimagnets due to non-magnetic impurities is predicted. Using the density-matrix renormalization group method and the exact diagonalization method, we confirm that the total spin can vanish due to a single impurity in finite chains. Introducing the picture of magnetic domain inversion, we numerically investigate the impurity-density dependence of magnetization. In particular, we show that even with an infinitesimal density of impurities the magnetization in the ground state is reduced by about 40% from that of the corresponding pure system. Conditions for the materials which may show this anomalous impurity effect are formulated.
Keywords
Cite
@article{arxiv.cond-mat/0603193,
title = {Anomalous impurity effect on magnetization in frustrated one-dimensional ferro- and ferrimagnets},
author = {Masanori Kohno and Xiao Hu},
journal= {arXiv preprint arXiv:cond-mat/0603193},
year = {2009}
}
Comments
4 pages, 6 figures